Table 3.
Predictors of injection ratings after one-month of use (N = 254 visits)
| N (%) | βa | 95% CI | p value | |
|---|---|---|---|---|
| Baseline participant characteristics | ||||
| Age | ||||
| 18–24 | 169 (66.5) | Ref | ||
| 25–30 | 85 (33.5) | 0.08 | − 0.20, 0.35 | 0.578 |
| Site | ||||
| South Africa | 129 (50.8) | Ref | ||
| Kenya | 125 (49.2) | − 0.04 | − 0.29, 0.21 | 0.743 |
| Married or cohabiting | 65 (25.6) | − 0.13 | − 0.42, 0.17 | 0.405 |
| Ever pregnant | 202 (79.5) | − 0.16 | − 0.44, 0.13 | 0.281 |
| Completed secondary school | 133 (52.4) | 0.24 | 0.00, 0.49 | 0.054 |
| Earns an income | 79 (31.2) | − 0.05 | − 0.34, 0.25 | 0.755 |
| Lives with | ||||
| Parents or grandparents | 129 (50.8) | Ref | ||
| Husband/boyfriend | 69 (27.2) | − 0.26 | − 0.62, 0.11 | 0.172 |
| Other | 56 (22.1) | − 0.06 | − 0.41, 0.29 | 0.744 |
| Food insecurity | ||||
| Never | 117 (46.1) | Ref | ||
| Rarely or sometimes | 99 (39.0) | 0.00 | − 0.28, 0.27 | 0.990 |
| Often | 38 (15.0) | 0.08 | − 0.32, 0.48 | 0.688 |
| Has privacy in the home | 210 (83.0) | 0.02 | − 0.27, 0.32 | 0.866 |
| Ever used injectable contraceptives | 179 (70.5) | − 0.24 | − 0.48, 0.00 | 0.054 |
| Sexual behavior | ||||
| # sex acts, past month (mean, SD) | 4.85 (5.4) | 0.01 | − 0.01, 0.03 | 0.314 |
| # sex partners, past month | ||||
| 0 or 1 | 222 (87.4) | Ref | ||
| > 1 | 32 (12.6) | − 0.17 | − 0.68, 0.34 | 0.509 |
| Product attributes | ||||
| Reports the following attribute as acceptable (vs. unacceptable) | ||||
| Product look | 224 (88.2) | 1.11 | 0.62, 1.59 | < 0.001 |
| Ease of use | 236 (92.9) | 1.10 | 0.48, 1.73 | 0.001 |
| Interference with normal activities | 230 (90.6) | 1.11 | 0.55, 1.67 | < 0.001 |
| How the needle felt | 157 (61.8) | 0.43 | 0.16, 0.70 | 0.002 |
| Feeling at injection site 1 day later | 217 (85.4) | 0.79 | 0.41, 1.18 | < 0.001 |
| Number of injections at a time | 178 (70.1) | 0.41 | 0.11, 0.71 | 0.008 |
| Having 2 injections per month | 171 (67.3) | 0.55 | 0.24, 0.86 | 0.001 |
| Possible to use without partner knowledge | 198 (78.0) | 0.07 | − 0.28, 0.41 | 0.702 |
| Possible to use without family knowledge | 186 (73.2) | − 0.11 | − 0.42, 0.19 | 0.460 |
aAdjusted for age, study site (South Africa vs. Kenya), and randomization sequence